Transkript

2 EN Front Panel Display The display shows the primary and standby frequencies and a series of icons to indicate the operating mode of the radio. The primary frequency is at the top and the standby frequency is at the bottom half of the screen. The TX icon shows that the radio is transmitting. An RX icon shows that the frequency is active and the audio will be heard through the headphone and speaker outputs. The standby frequency will only be received during the MONITOR function which is indicated by a +2 icon when active. The bottom right hand side indicates what frequency step size is selected. On/Off, Volume and Squelch Knob The left hand knob controls the power to the VHF radio, adjusts the audio volume, and controls the squelch. Turning this knob clockwise will switch on the radio and then increase the volume. Turning anticlockwise will reduce the volume and eventually will click off. Pressing this knob toggles the automatic squelch on and off, which can be used to listen for faint stations and as a simple audio test. 1

3 EN Tuning Knobs The right hand concentric knobs are used to tune the radio. The large knob adjusts the MHz portion of the standby frequency, and the smaller knob adjusts the khz portion of the standby frequency. Pressing the end of the small knob changes the channel spacing that the small knob operates through. If the radio is configured for 8.33 khz operation, the steps toggle between 8.33 khz channels and 25 khz channels. If the radio is configured only for 25 khz operation, the steps toggle between 25 khz and 50 khz channels. Changing the step size does not change the behaviour of the radio, only the tuning knob step size it helps to quickly tune a frequency. Flip-flop Button The flip-flop button swaps the frequency in the standby position into the active position, and moves the active frequency to the standby position. MON Button The VHF radio includes a dual-frequency listen feature; pressing the MON button toggles this feature on and off. When the monitor is active, a +2 icon appears next to the standby frequency, and the radio will scan between the active and standby frequencies listening for transmissions. The primary channel has priority a transmission on the primary channel will interrupt the secondary channel. As an aid to identifying which channel is active, the RX icon will light next to the active channel and the secondary channel will appear slightly quieter than the primary. This is useful in an aircraft with only a single radio since it allows you, for example, to copy the ATIS whilst maintaining a listening watch on the ATC frequency. Remote Frequency Database If a compatible GPS is connected, the controller will be loaded with airport frequencies from the GPS database. These frequencies are accessed by pressing the MEM button. The airport frequencies and selection order are determined by the data sent to the controller from the GPS. 2

4 EN The available airports can be scrolled through using the large frequency select knob. The individual frequencies associated with that airport can be scrolled through by using the smaller frequency select knob. After you have stepped through all the loaded airports, or if there is no GPS attached, the built-in memory of the controller will be displayed. In each case the selected frequency is loaded into the standby position. Pressing MEM again leaves the stored frequency in the standby window. Pressing the Flip-flop button loads the stored frequency directly into the active channel. Note: When the controller is displaying the available airport frequencies it will not accept any new updates from the GPS to avoid the frequencies changing during selection. To allow the GPS to update the available frequency database you must come out of memory mode by pressing the MEM or flip-flop button. Frequency Memory If no GPS is connected and the MEM button is pressed, or if the large knob is rotated beyond the remote database the controller will access the internal quick reference memory. There are 9 quick reference memory locations and the bottom edge of the screen will display which memory location is currently selected (1 9). 3

5 EN Rotating the small frequency selector knob will step through the memory locations. The standby frequency window will display the stored frequency. To store a frequency in one of the memory locations it must first be tuned and active as the primary frequency. Press MEM to enter the memory mode in the usual way. Select the channel you want to overwrite with the tuning knobs. Now press, AND HOLD, the MEM button for 2 seconds. The current active frequency will be moved to the selected memory location, overwriting the existing contents. Intercom Function The TY91/TY92 radio has a built in intercom which can be installed as permanently engaged or selected via a switch. The intercom is voice activated and the audio is routed through to both of the headsets. The intercom squelch and volume can be adjusted independently from the radio function through the configuration menu. Stuck Mic If the PTT switch is stuck in the ON or transmit position, the radio will automatically cut out after 35 seconds as a safety measure. Configuration Mode Additional setup items can be accessed by holding down the MON button for 5 seconds. The menu options can be selected using the larger inside tuning knob and the parameter value can be altered using the smaller outside tuning knob. 4

6 EN Intercom Volume Intercom Squelch AUX In Volume AUX In Mute Sidetone Volume Radio Squelch Enable 8.33 khz Brightness Sets the intercom volume level Sets the sensitivity of the intercom voice operated squelch Sets the volume level of the auxiliary input Mutes the auxiliary audio when a VHF transmission is received by the radio Sets the volume level of sidetone heard when transmitting Sets the sensitivity of the radio squelch Sets the frequency step size to 8.33/25 khz or 25/50 khz Sets the LCD backlight brightness General Low Temperature Operation The TY91/TY92 is certified to operate correctly down to -20 C, but at low temperatures the controller display may be impaired. On a cold day you may need to wait for the cockpit to warm up to ensure normal operation. Warning Messages If the VHF radio detects a problem, the screen will indicate WARNING and a brief statement of the problem. Depending on the nature of the problem, your VHF radio may not be working properly. Note the message on the screen and pass that information to your avionics maintenance organisation. Press ENT to clear the message. 5

7 EN The following warnings may be seen: Remote Hot The remote radio is overheating. Stuck Mic The PTT switch has been closed for more than 35 seconds. Low Volts The aircraft power input is below 10 volts (TY91) or 16 volts (TY92). No Radio Connection between the controller and the remote radio has been lost. Radio Fault The remote radio is reporting an unspecified fault. Fault Annunciation If the VHF radio detects a catastrophic internal failure, the screen will indicate FAULT and a brief statement of the problem. Note the FAULT message at the bottom of the screen and pass that information to your avionics maintenance organisation. The fault may be cleared by recycling the power to the radio but if the fault is still present the message will reappear. 6

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